Agree with Baja re more light and all other advice.
I'm wondering, could that possibly be an incredibly intrepid Jade plant (Crassula ovata) that is severely starved for light and nutrients? I have known them to survive unbelievably harsh conditions, so 14 years in a little pot on the kitchen counter isn't out of the question. I'm sure it wasn't always so puny.
@purpleinopp what do you think?
If so, water it thoroughly when you water, then let it get nearly completely dry before watering again. Personally, I think that pot looks big for that tiny ailing plant this time of year, but I agree that it probably shouldn't be disturbed again right now. Your description of how it reacted to repotting suggests that its roots got damaged when it was moved and then couldn't adequately support the the top growth, so the goal now is to allow the roots to mend. Even though you should water well when you water, be very careful not to let the soil get soggy or allow water to remain in the saucer (the pot has drainage, right?). Try to keep it in warmth and light. No fertilizer until you see new growth in spring, and then be sure to dilute it well. Best luck to that little guy!
